Lock



Oct. 1, 1929. J. KOHN 1,730 011 LOCK Filed Dec. 5, 1924 JACOB KOHN INVENTOR ATTORNEY Patented Oct. 1, 1929 JACOB KOHN, OF NEW YORK, N. Y.

LOCK

Application filed December 3, 1924. Serial No. 753,699.

This invention relates to looks for doors and the like, and of the type that has the mechanism enclosed within a casing, and that can be opened, by authorized persons, from both the inside and the outside of the door.

The main object of this invention is to produce a lock that will efiectively prevent opening of the look by jimmying. A further object is to provide a construction that is mechanically simple, and one that lends itself to easy and ready assembly, so as to reduce the cost of manufacture.

Additional objects and advantages will appear hereinafter;

Referring to the accompanying drawings:

Figure 1 is an elevation with the cover plate removed and the keeper in place, the casing and keeper being in section, and the parts he in shown in their unlocked position.

Tigure 2 is a sectional plan view of the lock along the line AA of Fig. 1, the door being shown in section, and the cover plate being in place.

Figure 3 is an elevation of another form of 25 this invention, the casing being shown in section, the keeper, tumbler, and cover plate being removed.

Figures 4 and 5 are sectional plan and elevation, respectively, of a bushing used for 30 engagement with key-controlled means for actuating the bolt in the lock.

A metal casing 1 is suitably secured to the door 2 by screws placed through the openings 3 in the casing 1 and the openings 4 in the cover plate 5. The keeper 6 is fastened to the door frame 7 by screws passing through the openings 8 in the keeper. The door is provided with the customary key-receiving cylinder 9, the'key 10 being shown inserted therein.

The bolt 11 consists of the locking portion 13, the body 14, the extension 15, the stop 16, and the gear teeth 17. The bolt 12 comprises the locking portion 18, the body 19, and the gear teeth 20. Studs 21 and 22, each threaded at one end, are secured to the casing 1 by screwing into the bosses 23 and 24 respectively. These studs serve as PIVOt-S for the bolts 11 and 12,- and are adapted to fit 50 into the openings 25 and 26 on said bolts. A

cam plate 28 is suitably attached to knob 29 at 30 located on the axial center line of said knob. Attached to the said cam plate is a pin 31, located eccentrically with respect to the knobs axis of rotation, said pinextending into slot 32 onsaid' extension 15, the end of this pin not to extendbeyondthe surface 33 of bolt 11. The bushing 34,.shown in de-- tail in Figures 4 and 5, is adapted to fit into slot 32 in such manner that the parallel sides 33 and 34 of said bushing abut against the sides 35 and 36 0f said slot, so as to allow a sliding movement of the bushing within said slot. Bushing 34 is hollow, containing an open-ended hole, the smaller portion 37 of said hole being made to receive the pin 31, and the expanded portion 38 being made to receive the pin 39 eccen'trically attached to arm 40 which is suitably connected to the key operated cylinder 9. The slot 41 in said bushing is adapted to allow the pin 39 to move through it to its position in the expanded portion 38 of the said bushing. The tumbler 42, pivotally attached to the pin 43, contains a leaf spring 44 bearing against the casing 1. At the extremity of this tumbler is a finger 45 adapted to engage the recesses 46 and 47, in cam plate 28. The extension 48, integral with the tumbler, is adapted to engage the notch 49 on bolt 11 to lock the bolt when itis in projected. position.

In turning the knob 29 in the direction of the arrow 6, the cam plate 28 will revolve about its center30, so that the pin 31 will be caused to generate an arc in the direction of the-arrow 0. As the bolt 11 is free to rotate I about the stationary stud 21 as a center, and as the bushing, actuated by the pin 31, is free to slide along the slot 32 in the direction of the arrow (5, it is evident that a rotary move ment of the knob in the direction shown,will result in a sliding movement of the bushing in the slot 32, thereby causing a clockwise rotation of the bolt 11. Thus, when the bushing reaches the extremity 52 of the slot, the look ing portion 13 of the bolt 11 will have moved in. the direction of the arrow 6, and into the ear of the keeper 6. The gear teeth 17 on bolt 11, engaging the teeth 20 on bolt 12, will cause a counter-clockwise rotation of bolt 12,

so that its locking portion 18 will move in the direction of the arrow 7", and into the car 51 of keeper 6, thus locking the door.

The movement of the key 10 in the direction of the arrow 9 will cause the rotation of the arm 10, so that the pin 39 will be caused to generate an arc in a manner similar to that of pin 31, hereinbeforedescribed. This pin 39, which can enter the hole 38 of the bushing through the slot 41, actuates the bushing to cause it to slide within the slot 32, thus producing a clockwise rotationof bolt 11 and swinging the parts into a locking position.

The unlocking action of the parts is just the, reverse of the locking action already described, the locking portion 18 of the bolt 12 abutting against the stop 16 of bolt 11 when in'its unlocked state.

Due to the tension of the spring 44, the finger of the tumbler is always in contact with the side of the cam plate 28. In the unlocked position, this finger rests at the recess 46, preventing a counter-clockwise rotation of the knob 29. hen, in locking the door, the cam plate 28 is turned clockwise,

and the bolts reach their locked positions, the recess M will reach the position previously occupied by recess 46. At this point, the finger 45 snaps into the recess 47, causing the extension 48 on the tumbler to engage the notch 49 on the bolt 11, thus holding the bolts in their locked positions.v WVhen the cam 28 is turned in a counter-clockwise direction to unlock the bolts, the side of the recess 47 actuates the finger 45 causing the tumbler to further movement, and thus hold the bolts rotate in a counter-clockwise direction around center 43, against the action of the spring 1 1. In this manner the extension 48 is lifted out of the notch 49, thereby releasing the bolts.

Supplementing the tumbler, the bushing 3 L also serves as a locking device. Assuming that there is no tumbler, and that the parts are in their locked positions, with the bushing 3d at the extremity 52 of the slot, and that the locking portions 13 and 18 of the bolts are engaging the ears of the keeper, then a counter-clockwise or downward force exerted on 13, or a clockwise or upward force exerted on 18, will tail'to produce any rotation. of the bolts 11 and 12. It is essential, in order to produce this result, that the line passing through the center of the pin 31 and center 30 should fall below center 25, as shown; and

' that the length and position of the slot 32 be designed so that the radii from center 30 to the extremity 52 of the slot, and from center 25 to the said extremity meet below the line joiningcenter 25 and center 30. The ends of said radii will thus block eachother from in their projected positions. In order to successfully jimmy the lock, it is necessary to remove the bushing 34, and to force the tumbler down'in the direction of the arrow posts; the studs being screwed into the bosses after the bolts are in place.

That portion of the casing extending beyond the door, that is, the extension 53, can be made to extend along the entire height 0t the look, from point 54: to point 55, or from point 56 to point 57, as manufacturing con-- ditions would require.

The ears on the keeper may be perforated,

as shown on the drawing, or may be hollowed out sufliciently to accommodate the locking portions of the bolts, according to conditions of manufacture.

Another characteristic of this lock is that it is of the type wherein the key will actuate the knob, as any movement of the bushing 34; will be directly transmitted to the pin 31, and thence to the knob. However, in turning the knob, the loosely fitting pin 39 will be swung out through the slot e1 in said bushing, thereby freeing the key cylinder from the action of the knob.

Figure 3 is an elevation of another form of this invention. A knob or key, turning in the direction of the arrow 6', will result in a movement of the pin-actuated bushing 34: along the slot 32', thereby causing a horizontal linear motion of the bolts 11 and 12 to the positions of e and 7. At this point extremities 58 and 59 of the slots 60 and 61 on said bolts will reach the guide posts 21 and 22. The bushing 34:, continuing in its counterclockwise arcuate path, actuates the bolt 11. at this point so as wise around post 21 to its new position 6, imparting a counter-clockvstise rotation to bolt 12 to position 7.

This invention is not limited in its con.- struction to the exact forms hereinbefore described, as changes can be made without departing from the scope of the claims.

What I claim is: V

1. A lock comprising a casing adaptable to be secured to the side of, a door; keeper adaptable to be secured to door frame; two bolts suitably mounted on said casing and each of said bolts being provided with gear teeth, said bolts being placed adjacent to each other and in such manner to permit said teeth to engage each other; means to guide the movement of the bolts to their locked and unlocked positions; one of said bolts contain ing, integral with itself, a slotted extension;

to cause it to rotate clockin their operative and in their inoperative positions.

2. Alock comprising a casing adaptable to be secured to the side of a door; a keeper at aptable to be secured to a door frame; two bolts w inn said casing, said bolts being procontrolled means for engaging the slot in said extension to actuate said bolt with the extension; and means for locking the bolts against movements when in their operative and in their inoperative positions.

3. A look comprising a casing adaptable to be secured to tl e side of a door; a keeper adaptable to be secured to a door frame; two bolts within said casing, said bolts being provided with gear teeth and placed adjacent to each other in such manner as to permit said teeth to engage each other; said bolts being so mounted on said casing as to permit of both a straight linear and rotary locking and unlocking movement of said bolts; one of said bolts containing an extension with a slot therein; key-controlled and knob-controlled means for engaging said slot in said extension to actuate said bolt with the extension; and means for locking the bolts against movements when in their opera tive and in their inoperative positions.

a. A lock comprising a casing adaptable tc be secured to the side of a door; a keeper adaptable to be secured to a door frame; two boltssuitably mounted on said casing, and each being provided with gear teeth, said bolts being placed adajacent to each other and in such manner as to permit said teeth to engage each other; a knob-controlled cam plate placed against said casing in such man nor as to permit of its rotation in the direction of said knob a key-controlled arm adapt ed to rotate in the same direction as the key; said cam plate said arm each containing a suitably attached pin placed eccentrically with respect to the axes of said plate and arm; one of said bolts containing an extension with a slot therein; the said pins being adapted to engage said slot to actuate said bolt with the extension; and a tumbler mounted on said casing and adapted to engage the bolt with the extension, and hold it against movement in either direction.

5. A lock comprising a casing adaptable to be secured to the side of a door; a keeper adaptable to be secured to a door frame; two bolts within said casing, said bolts being provided with gear teeth and placed adjacent to each other and in such manner as to permit said teeth to engage each other; two studs,

each threaded'at one end, and adapted to fit into two interior-.tlneaded bosses on said casing; said'bolts being pivotly mounted on said studs to permit of rotarylocking and unlocking movement of each of sa d bolts 111.. opposite directons; one of said bolts containin an extension with a slot therein. keycontrolled and knob-controlled means for engaging the slotin said extension to actuate said bolt with the extension; and means for locking the bolts against movements when in their. operative and in their inoperative positions. v v

6. A lock comprisinga casing adaptableto be secured to the sidejofa door; a keeper adaptable to be secured to a door frame; two bolts suitably mounted on said casing, and each of said bolts being providedwith gear teeth, said bolts beingplaced adjacent to 7 A look compris ng a casing adaptable to be secured to theside of a'do'or; a keeper adaptable to be secured to a door frame; two bolts suitably mounted on said casing, each being provided withg'gear. teeth, said bolts being places. adjacent to each other, and in such manner as to permit said teeth to engage each other; a knob-controlled cam plate placed against said casing in such manner as to permit of its rotation in the direction of the, knob; a key-controlled armadapted to rotatein the same direction as the key; said cam plate an said arm 'eaclrcontammg a suitably attached pin placed eccentrioally with respect-to-the axes of rotation of said arm and plate-; one ofzsaid bolts belng provided with an extension contammgalaterally enclosed slot; a hollow, removable bush-' ing adapted to fltinto said slot topermit of its movement in the longitudinal direction of i said slot; said pins being adapted to fit into and actuate said bushing within said slot so as to actuate said bolt with the extension; and a tumbler mounted on said casing and adapted to engage said bolt with the extension, and hold it against movement in either direction.

8. A look comprising a casing adaptable to be secured to the sideof a door; a keeper adaptable to be secured to a door frame, said keeper being provided with suitably hollowed or perforated ears adapted to receive said bolts moving in a vertical plane; two bolts suitably mounted on said casing, and each of said bolts being provided wit-h gear teeth, said bolts being placed adjacent to each other, and in such manner as to permit said teeth to engage each other; means to guide the movements of the bolts to their locked and unlocked positions; one of said bolts containing an extension with a slot thereon; key-controlled and knob-controlled means for engaging the slot in said extension to actuate said bolt with the extension; and means for locking the bolts against movements when in their operative and in their inoperative positions.

' 9. A look comprising a casing adaptable to be secured to the side of a door; a keeper adaptable to be secured to a door frame; two bolts suitably mounted on said casing, each of said bolts being provided with gear teeth, said bolts being placed adjacent to each other, and in such manner as to permit said teeth to engage each other; means to guide the movements of the bolts to their locked and unlocked positions;an extension projecting transversely from one of said bolts; keycontrolled and knob-controlled means for engaging the said extension to actuate the said bolt with the extension; and means for locking the bolts against movement when in the locked and in their unlocked positions.

10. A lock comprising a casing adaptable to be secured to the side of a door; a keeper adaptable to be secured to a door frame; a plurality of bolts suitably mounted on said casing, said bolts being provided with gear teeth and so positioned with respect to one another as to permit an interengagement of said teeth, to enable one or more of said bolts to actuate the others; means to guide the movements of said bolts to their locked and unlocked positions; an extension projecting from one of said bolts; key-controlled and knob-controlled means for engaging the said extension to actuate the said bolt with the extension, and produce a co-operative look ing and unlocking movement of said bolts; and means for locking the bolts against movement when in their locked and in their unlocked positions.

In testimony whereof I affix my signature. JACOB KOHN. 

